Hi...I have a Jacuzzi, Echo Z112 we bought new in 2001. About 2 years ago, I had a service tech put in a new heater and a new pressure switch. All was fine till recently, I was getting the FL error...Sometimes, it would work though, then cycle a few times, then when it was to turn back on, FL error again and nothing...My husband thinks it is the pressure switch...He thinks it can be adjusted...We want to try to fix it ourselves first before we call someone, cant afford to call someone now...Well, today, it was working again when we plugged it in, got the FL error...unplugged it, now we have this error...Sn...We figure it is a sensor error...Not sure...My question...can the pressure switch be adjusted? If so, how should we do it? Does anyone know what the Sn error is on this model? I know it is a crappy tub, but it has served me well and I cant afford a new one now...I am disabled and 1 paycheck household sucks, if you know what I mean...so we have to try to fix it. We will replace the pressure switch if we decide that is it...Any ideas would be greatly appreciated. The tech that did fix it last time, gave me an est. of $250.00 and said would take 2 weeks to get the parts...took 4 weeks and he charged me $550.00 and just did what he said he was going to do, then told me I was wrong on the est...even though I had it in writing...I really dont want to have to call someone out if I dont have to....Thanks, Rose